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Edexcel A-Level Physics Diffraction and Huygens

Practise Edexcel A-Level Physics diffraction and Huygens’ construction through wavefront spreading, secondary wavelets and slit or obstacle diagrams.

Syllabus
Pearson Edexcel International Advanced Subsidiary/Advanced Level
Course
Physics XPH11/YPH11
Level
AS

Exam points

  • define diffraction as wave spreading through a gap or around an obstacle
  • explain Huygens’ construction using secondary wavelets and superposition of wavefronts

2.3.50 - Diffraction and Huygens’ construction question 1

[Maximum number: 2]

Boats can shelter from waves on the sea in a harbour.

The diagram shows a harbour where boats can enter and leave through two gaps in the harbour wall.

Figure for Question 2.3.50 - Diffraction and Huygens’ construction question 1 — Edexcel A-Level Physics AS

Waves on the sea are diffracted as they pass through the gaps in the harbour wall.

Describe how Huygens' construction can be used to predict the shape of diffracted wavefronts.

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